import 'package:flutter/material.dart';

//Flutter Row
void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
      ),
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
        title: Text(widget.title),
      ),
      body: Center(
        child: Container(
          height: 400,
          color: Colors.grey[200],
          //左右 填充
          //上下 包裹
          //水平左右  主轴  上下 就是交叉轴
          child: Row(
            //CrossAxisAlignment.stretch 拉伸组件 充满高度
            crossAxisAlignment: CrossAxisAlignment.center,
            mainAxisSize: MainAxisSize.max,
            mainAxisAlignment: MainAxisAlignment.spaceAround,
            children: [
              Container(width: 50, height: 50, color: Colors.red),
              Container(width: 50, height: 50, color: Colors.blue),
              Container(width: 50, height: 50, color: Colors.orange),
            ],
          ),
        ),
      ),
      // This trailing comma makes auto-formatting nicer for build methods.
    );
  }
}
